Portal de Periódicos da CAPES

Frequency Response and Modal Parameters of Sandwich Composite with Debonding Under Random Vibration Excitations

2024; Springer Nature; Linguagem: Inglês

10.1007/978-3-031-57324-8_24

2195-4364

Sirine Ben Ameur, Ahmed Yaich, Abdelkahalk Elhami, Moez Beyaoui, Abdelghani Saouab, Mohamed Haddar,

Acoustic Wave Phenomena Research

One of the primary types of dynamic loads is random vibration analysis. Composite sandwich materials used in dynamic structures are likely to be damaged due to high acceleration, stress levels, and deformation under dynamic loads. Therefore, it is essential to analyze these materials under dynamic load conditions. In this study, a composite sandwich consisting of two thin skins composed of aluminum bonded to a lightweight core material of PVC foam is analyzed under a random vibration load in the form of white noise. The studied composite sandwich acts as a clamped-free beam and is subjected to PSD G acceleration applied to its fixed edge. Two cases of sandwich composite material were studied, one being the case of an undamaged sandwich composite, and the other being the case of a damaged sandwich composite due to debonding at the skin- core interface. This study has two parts. The first is modal analysis, which is the basis that precedes the analysis of random vibrations through spectral analysis, which constitutes the second part. This work aims to explore the effect of damage by debonding at the skin-core interface on the frequency response of the composite sandwich under random vibration.